They will disappear from your "folllowed" people & when you go to send a tweet to them their address won't take on your outgoing. Also, if u try & follow them it says you are blocked. The only way to get around it (I think) is to go to their profile and look at their recent tweets and then reply to them.

You stop receiving tweets from that person. I got blocked from Beth, I don't remember what for. Probably for endless messages calling her a cunt, gold digger, horse face, NSAL is a scam charity, etc. I just love that she reads what people tweet to her, she is so vain. If someone blocks you, you can't get anymore tweets from them, but you can still send them tweets. So I continue to send her hate tweets. Check this out when you try to follow Beth when she bans you, it's a screen cap from my Iphone.